21341300451 has 4 divisors (see below), whose sum is σ = 28455067272. Its totient is φ = 14227533632.

The previous prime is 21341300447. The next prime is 21341300483. The reversal of 21341300451 is 15400314312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21341300451 - 2² = 21341300447 is a prime.

It is a super-2 number, since 2×21341300451² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21341300401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3556883406 + ... + 3556883411.

It is an arithmetic number, because the mean of its divisors is an integer number (7113766818).

Almost surely, 2^21341300451 is an apocalyptic number.

21341300451 is a deficient number, since it is larger than the sum of its proper divisors (7113766821).

21341300451 is an equidigital number, since it uses as much as digits as its factorization.

21341300451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7113766820.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21341300451 its reverse (15400314312), we get a palindrome (36741614763).

The spelling of 21341300451 in words is "twenty-one billion, three hundred forty-one million, three hundred thousand, four hundred fifty-one".